Vital sign instrument



FIG. 1 is a top view of a vital sign instrument;

FIG. 2 is top isometric view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top, side perspective view thereof; and,

FIG. 6 is a bottom, side perspective view thereof. 

CLAIM The ornamental design for a vital sign instrument, substantially as shown and described. 